Fantastic kit of top 60wt thread and prewound bobbins in matching color.
The thinner 60wt top thread is great for small lettering with a delicate look and lace designs to get a soft and gentle finish or any other projects where it's important to make both sides of the design look well.

The kit includes 144 bobbins (6 of each color) and 24 cones of poly thread 60WT (1 1100-yard cones of each color to match the quantity of bobbin thread).

The bobbins L-size are 60wt thread, L size, and plastic sided.
Most embroidery machines use bobbins with these qualifications. If you're not sure whether your machine accepts L size bobbins, just measure your original bobbin. If its diameter is 0.8 inches (20 millimeters) and the height is 0.3 inches (7.5 millimeters), then your machine takes L size bobbins and you may buy this kit with assurance. Also, here's a list of embroidery machines sorted by the type of bobbins they use.